Sökning: "CVD"

Visar resultat 1 - 5 av 339 avhandlingar innehållade ordet CVD.

  1. 1. Cutting Edge Titanium-based CVD Hard Coatings

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Linus von Fieandt; Uppsala universitet.; [2018]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; CVD; Hard coatings; Ti C; N ; TiN;

    Sammanfattning : Modern tools for metal cutting applications, such as turning or milling, are typically improved with a thin protective coating. Despite being only a few microns thick, the coating can increase the lifetime of the tool by more than 100 times compared to an uncoated tool. Two different types of techniques are normally used to deposit the coatings, i. LÄS MER

  2. 2. Fluorinated SiC CVD

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Pontus Stenberg; Linköpings universitet.; Linköpings universitet.; [2017]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : For the emerging semiconductor material silicon carbide (SiC) used in high power devices, chemical vapor deposition (CVD) is the most prominent method to create the electrically active SiC epitaxial layers in the device. The process of growing such epitaxial layers is to use a hydrocarbon and silane diluted in hydrogen flow through a hot chamber where chemical reactions take place in such manner that Si and C finally deposit on the surface creating epitaxial SiC. LÄS MER

  3. 3. Muspel and Surtr CVD system and control program for WF6 chemistry

    Detta är en avhandling från Uppsala : Department of Chemistry - Ångström

    Författare :Johan Gerdin Hulkko; Uppsala universitet.; [2019]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; CVD; W; WN; system; WF6; TiN; control program; LabView; CVD; W; WN; system; WF6; TiN; styrprogram; LabView; Chemistry with specialization in Inorganic Chemistry; Kemi med inriktning mot oorganisk kemi;

    Sammanfattning : CVD (Chemical Vapour Deposition) is an advanced technique for depositing a coating on a substrate. CVD implies that a solid phase is deposited on a normally heated substrate surface using a reactive, gaseous mixture. The reaction gas mixture must be carefully chosen to prevent homogeneous nucleation in the gas phase. LÄS MER

  4. 4. CVD on Iron Powder - Using Fluidising Bed Techniques

    Detta är en avhandling från Uppsala : Department of Chemistry - Ångström

    Författare :Lars Nilsson; Lund University.; Lunds universitet.; [2001]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; aluminium oxide; alumina; chemical vapour deposition; eddy current losses; FBR; iron; fluidising bed reactor; powder; SiO2; SMC; TiO2; Al2O3; soft ma etic com sites; CVD;

    Sammanfattning : Today's electrical energy conversion devices, such as motors, transformers, inductors and generators, are based on laminated magnetic cores for reduction of eddy current losses, imposing a two-dimensional magnetic flux distribution. Using a three-dimensional magnetic flux distribution while maintaining low magnetic losses requires new approaches to magnetic core materials. LÄS MER

  5. 5. Photon stimulated CVD of amorphous carbon thin films : By Mikael Lindstram

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Mikael Lindstam; Uppsala universitet.; [2000]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; photolysis; thermal activation; CVD; amorphous carbon; modelling; kinetics; Kemi; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi; Inorganic Chemistry; oorganisk kemi;

    Sammanfattning : Amorphous carbon has attracted much interest for several decades now because of its complex crystal structure and microstructure. Depending on the carbon sp2/sp3 bonding ratio, these materials yield a broad spectrum of useful properties; which can be tailored for specific applications. LÄS MER